Is it dangerous to heat up a crafting pipe cleaner?

I am wondering whether its safe to melt, not burn, pipe cleaners to see what happens. I am wondering whether it's made with something extremely toxic or carcinogenic such as PVC in which the fumes would be harmful.

Did you make this instructable?

Wikipedia says, " 'Craft' pipe cleaners are usually made with polyester or nylon pile..." Assuming that's true, I don't think you have to worry about dioxin fumes if such a pipe cleaner catches fire, because neither polyester, nor nylon contain chlorine.

"Dr. Manhattan, as you know, the Doomsday Clock is a symbolic clock face analogizing humankind's proximity to extinction, midnight representing the threat of nuclear war. As of now, it stands at four minutes to midnight."

"My father was a watchmaker. He abandoned it when Einstein discovered that time is relative. I would only agree that a symbolic clock is as nourishing to the intellect as a photograph of oxygen to a drowning man."

"So you're saying there is no danger."

"Even in a world without nuclear weapons, there would still be danger."

It's "dangerous" to heat up about anything. Are you speaking specifically to fire hazard, fumes, or what? The answer is probably yes, so just experiment with a small sampling in a safe outside area first.